1. 3 2 2 5 5 5 7 8 8 9 11 11 ?
   1. 12

   2. 11

   3. 9

   4. 14

   5. 16
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   Answer & Explanation
   Sol: Option 2
   Explanation: There are three parallel series going on in this question. The 1^st, 4^th, 7^th terms are using logic of -1, 2^nd, 5^th and 8^th terms are using logic of +1 and 3^rd, 6^th and 9^th terms are using logic of +1 again. Answer will be 11, which belongs to 1^st, 4^th and 7^th term.
2. 7 9 8 6 10 9 5 11 10 ? 12
   1. 4

   2. 11

   3. 56

   4. 5

   5. 29
   Answer & Explanation
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   Sol: Option 1
   Explanation:There are three parallel series going on in this question. The 1^st, 4^th, 7^th terms are using logic of -1, 2^nd, 5^th and 8^th terms are using logic of +1 and 3^rd, 6^th and 9^th terms are using logic of +1 again. Answer will be 4, which belongs to 1^st, 4^th and 7^th term.
3. 1 3 2 6 3 11 4 18 5 ?
   1. 27

   2. 25

   3. 23

   4. 29

   5. 20
   Answer & Explanation
   Sol: Option 1
   Explanation:  
4. 13 17 23 29 31 37 ??
   1. 22

   2. 41

   3. 19

   4. 23

   5. 27
   Answer & Explanation
   Sol: Option 2
   Explanation: The given series is a prime number series. Hence the next prime number in this sequence would be 41.
5. 17 16 14 12 11 8 8 ?
   1. 4

   2. 7

   3. 3

   4. 2

   5. None of the above
   Answer & Explanation
   Sol: Option 1
   Explanation: There are two series:
   I^st : 17 14 11 8 and 2^nd: 16 12 8 ?
   In first series, -3 , -3 ,-3….. and in 2^nd series , -4 , -4 ,-4….
   Therefore, next term will be 8 – 4 = 4.

6. 3, 12, 8, 19, 13, 32, 18, 42, 23, 52
   1. 12

   2. 19

   3. 42

   4. 32

   5. None of the above
   Answer & Explanation
   Sol: Option 2
   Explanation: The sequence is a combination of following two series:
   I. 3, 8, 13, 18, 23 and II. 12, 19, 32, 42, 52
   The pattern in I has a constant difference of +5, and the pattern in II has a constant difference of +10. So, in II, 19 is wrong and should be replaced by (12+10) i.e. 22
7. 31, 2, 41, 3, 52, 4, 61, 5, 71, 6
   1. 41

   2. 61

   3. 52

   4. 31

   5. 6
   Answer & Explanation
   Sol: Option 3
   Explanation: The sequence is a combination of two given series:
   I. 31, 41, 52, 61, 71 and II. 2, 3, 4, 5, 6
   So, the pattern in I is + 10
   Thus, 52 is wrong and should be replaced by (41 + 10) i.e. 51.
8. 10, 5, 19, 12, 39, 26, 73, 54
   1. 5

   2. 19

   3. 39

   4. 26

   5. 54
   Answer & Explanation
   Sol: Option 3
   Explanation: The sequence is a combination of the following two series:
   I. 10, 19, 39, 73, and II. 5, 12, 26, 54
   The pattern in I becomes + 9, + 18, + 36, So 39 should be replaced by 37. So, 39 is wrong.
9. 1, 10, 9, 16, 25, 26, 49
   1. 1

   2. 16

   3. 26

   4. 9

   5. 49
   Answer & Explanation
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   Sol: Option 2
   Explanation: The given sequence is a combination of two series:
   I. 1, 9, 25, 49 and II. 10, 16, 26
   The pattern in I is +8, +16, +24.
   The sequence in II is 3² + 1, 4² + 1, 5² + 1
   So, 16 is wrong and must be replaced by (4² + 1) i.e. 17.
10. 1, 125, 729, 2177
    1. 2177

    2. 729

    3. 125

    4. 1

    5. 121
    Answer & Explanation
    Sol: Option 1
    Explanation: 1, 125, 729, 2177
    1 = 1³ , 125 = 5³, 729 = 9³. So, next number would be 13³= 2197
    Therefore, 2177 is wrong.

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